<p>I am experiencing a strange problem with Powerpoint 2007 and 2010 files in Openlp 1.9.10, with the 2007 powerpoint viewer. When showing a powerpoint file in OpenLP using the 2007 viewer, the display to the projector cuts to the desktop background after about 65 seconds (not always that time but usually about a minute or so). I think the powerpoint show is going to the end of the show, but I'm not completely sure. The strange thing is that the error does not happen with 2003 Powerpoint files. Has anyone else experienced this problem?</p><p>Operating system is windows 7. I'm reluctant to purchase a full copy of Office 2010 because I wouldn't use anything apart from Powerpoint.</p><p>Thanks.</p>